Cylinder Head Gasket – Fits Volvo Penta MD5 Series (Replaces 859134, 838127)
Cylinder Head Gasket – Fits Volvo Penta MD5 Series (Replaces 859134, 838127) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Cylinder Head Gasket – Fits Volvo Penta MD5 Series (Replaces 859134, 838127) is backordered and will ship as soon as it is back in stock.
Product Details
This high-quality Cylinder Head Gasket – Fits Volvo Penta MD5 Series is designed for specific marine diesel engines, including the MD5A, MD5B, and MD5C models. It ensures a reliable, long-lasting seal for optimal engine performance and compression.
This gasket is a direct replacement for Volvo Penta part numbers 859134 and its predecessor, 838127.
- Installs as a direct OEM-style replacement.
- Engineered specifically for marine diesel environments.
- This is a New Old Stock (NOS) item, offered with a Non-DOA guarantee.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Volvo Penta | 838127 | 859134 | Original part number. |
| Volvo Penta | 859134 | Current part, supersedes 838127. |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Volvo Penta Owners: This part is confirmed to fit the MD5 series engines listed. Always cross-reference your part number to ensure correct fitment.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | MD5A | 859134, 838127 | 838127 was superseded by 859134. |
| Volvo Penta | MD5B | 859134, 838127 | 838127 was superseded by 859134. |
| Volvo Penta | MD5C | 859134, 838127 | 838127 was superseded by 859134. |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Direct OEM replacement
- Fuel Type
- Diesel
- Dimensions
- 18.0 in L x 15.0 in W x 0.5 in H
- Weight
- 0.13–0.45 lbs (0.06–0.2 kg)
- Warranty
- Non-DOA guarantee (NOS item)
- Condition
- New Old Stock (NOS)
What’s in the Box
- 1 x Cylinder Head Gasket (859134)
Installation Notes
- Disconnect the battery and completely drain the engine's cooling system.
- Remove all components blocking access to the cylinder head, including intake/exhaust manifolds and valve cover.
- Loosen and remove cylinder head bolts in the reverse order of the manufacturer's specified torque sequence.
- Carefully lift the cylinder head from the engine block. Avoid using pry bars that could damage the surfaces.
- Thoroughly clean both the cylinder head and engine block mating surfaces. Ensure all old gasket material, sealant, and carbon deposits are removed.
- Position the new head gasket correctly onto the engine block, checking for proper alignment with dowel pins and passages.
- Carefully lower the cylinder head back into place.
- Install new or verified-to-spec cylinder head bolts. Tighten them in stages following the engine manufacturer’s recommended torque sequence and values.
- Reinstall all previously removed components using new gaskets where required.
- Refill the cooling system, reconnect the battery, and check all fluid levels.
- Start the engine and let it reach operating temperature, checking carefully for any fuel, oil, or coolant leaks.
Troubleshooting & FAQ
How do I know if my cylinder head gasket is failing?
Common signs of a blown head gasket include engine overheating, loss of coolant with no visible external leaks, white smoke (coolant) from the exhaust, milky or discolored engine oil, and loss of engine compression or power.
Is this gasket compatible with my Volvo Penta MD5A engine?
Yes, this gasket is confirmed to fit Volvo Penta MD5A, MD5B, and MD5C series marine diesel engines. It replaces OEM part numbers 859134 and 838127.
What does "New Old Stock" (NOS) mean?
New Old Stock refers to parts that are new and unused but may have been stored for an extended period. They are genuine, original-era components that were never sold or installed. This item is guaranteed to be functional on arrival.
Should I use sealant or adhesive with this gasket?
Most modern head gaskets are designed to be installed dry without any additional sealants. Always consult your engine's official service manual for specific instructions, as requirements can vary.
Why is there a weight range listed for this part?
The weight can vary slightly based on packaging and measurement by different suppliers. The part itself is manufactured to a consistent specification, and this variation will not affect fitment or performance.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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